Diverse ages and origins of basement complexes, Luzon, Philippines
Journal Article
·
· Geology; (United States)
Geological field investigations and /sup 40/Ar//sup 39/Ar ages from two basement complexes in southeast Luzon document the first known occurrences of pre-Late Cretaceous age rocks in the eastern Philippines. However, individual components within the two complexes vary in age from Late Jurassic (Caramoan basement complex) to Early Cretaceous and early Miocene (Camarines Norte-Calaguas Islands basement complex). These and other data show that southeast Luzon basement complexes are genetically diverse, and they indicate that the concept of an old, autochthonous basement in the Philippines is open to question. This supports the hypothesis that the Philippine Archipelago is an amalgamation of allochthonous Mesozoic and Cenozoic island-arc, ocean-basin, and continental fragments that were assembled during the Tertiary.
- Research Organization:
- San Jose State Univ., CA (USA)
- OSTI ID:
- 6993228
- Journal Information:
- Geology; (United States), Journal Name: Geology; (United States) Vol. 16:4; ISSN GLGYB
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
58 GEOSCIENCES
580100* -- Geology & Hydrology-- (-1989)
AGE ESTIMATION
ARGON 39
ARGON 40
ARGON ISOTOPES
ASIA
BASEMENT ROCK
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
CRETACEOUS PERIOD
DEVELOPING COUNTRIES
EVEN-EVEN NUCLEI
EVEN-ODD NUCLEI
GEOLOGIC AGES
GEOLOGIC DEPOSITS
GEOLOGIC HISTORY
GEOLOGIC MODELS
ISLANDS
ISOTOPE DATING
ISOTOPES
LIGHT NUCLEI
MESOZOIC ERA
NUCLEI
PHILIPPINES
RADIOISOTOPES
STABLE ISOTOPES
YEARS LIVING RADIOISOTOPES
580100* -- Geology & Hydrology-- (-1989)
AGE ESTIMATION
ARGON 39
ARGON 40
ARGON ISOTOPES
ASIA
BASEMENT ROCK
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
CRETACEOUS PERIOD
DEVELOPING COUNTRIES
EVEN-EVEN NUCLEI
EVEN-ODD NUCLEI
GEOLOGIC AGES
GEOLOGIC DEPOSITS
GEOLOGIC HISTORY
GEOLOGIC MODELS
ISLANDS
ISOTOPE DATING
ISOTOPES
LIGHT NUCLEI
MESOZOIC ERA
NUCLEI
PHILIPPINES
RADIOISOTOPES
STABLE ISOTOPES
YEARS LIVING RADIOISOTOPES